Formulated & optimized for the staining of mouse splenocytes with the FJK-16s monoclonal antibody. eBioscience™ Mouse Regulatory T Cell Staining Kit #2 includes: Anti-Mouse CD4 FITC, CD25 PE and CD16/32, Anti-Mouse/Rat Foxp3 APC, Rat IgG2a Isotype Control APC, staining buffer, fixation concentrate.